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Thu, 09 Apr 2026 06:16:52 -0700 (PDT) From: Jiri Olsa X-Google-Original-From: Jiri Olsa Date: Thu, 9 Apr 2026 15:16:46 +0200 To: Menglong Dong Cc: Menglong Dong , Jiri Olsa , ast@kernel.org, daniel@iogearbox.net, john.fastabend@gmail.com, andrii@kernel.org, martin.lau@linux.dev, eddyz87@gmail.com, memxor@gmail.com, song@kernel.org, yonghong.song@linux.dev, shuah@kernel.org, emil@etsalapatis.com, bpf@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: Re: [PATCH bpf-next v2 1/3] bpf: add missing fsession to the verifier log Message-ID: References: <20260408062109.386083-1-dongml2@chinatelecom.cn> <20260408062109.386083-2-dongml2@chinatelecom.cn> <5090408.31r3eYUQgx@7940hx> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5090408.31r3eYUQgx@7940hx> On Thu, Apr 09, 2026 at 07:28:55PM +0800, Menglong Dong wrote: > On 2026/4/8 21:21 Jiri Olsa write: > > On Wed, Apr 08, 2026 at 02:21:07PM +0800, Menglong Dong wrote: > > > The fsession attach type is missed in the verifier log in > > > check_get_func_ip(), bpf_check_attach_target() and check_attach_btf_id(). > > > Update them to make the verifier log proper. Meanwhile, update the > > > corresponding selftests. > > > > > > Signed-off-by: Menglong Dong > > > Acked-by: Leon Hwang > > > --- > > > v2: > > > - add a missing FSESSION in bpf_check_attach_target() > > > --- > > > kernel/bpf/verifier.c | 10 +++++----- > > > tools/testing/selftests/bpf/prog_tests/exceptions.c | 8 ++++---- > > > tools/testing/selftests/bpf/verifier/sleepable.c | 2 +- > > > 3 files changed, 10 insertions(+), 10 deletions(-) > > > > > > diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c > > > index 594260c1f382..beb660b4c3ec 100644 > > > --- a/kernel/bpf/verifier.c > > > +++ b/kernel/bpf/verifier.c > > > @@ -11757,7 +11757,7 @@ static int check_get_func_ip(struct bpf_verifier_env *env) > > > > > > if (type == BPF_PROG_TYPE_TRACING) { > > > if (!bpf_prog_has_trampoline(env->prog)) { > > > - verbose(env, "func %s#%d supported only for fentry/fexit/fmod_ret programs\n", > > > + verbose(env, "func %s#%d supported only for fentry/fexit/fsession/fmod_ret programs\n", > > > func_id_name(func_id), func_id); > > > return -ENOTSUPP; > > > } > > > @@ -25561,7 +25561,7 @@ int bpf_check_attach_target(struct bpf_verifier_log *log, > > > btf = tgt_prog ? tgt_prog->aux->btf : prog->aux->attach_btf; > > > if (!btf) { > > > bpf_log(log, > > > - "FENTRY/FEXIT program can only be attached to another program annotated with BTF\n"); > > > + "FENTRY/FEXIT/FSESSION program can only be attached to another program annotated with BTF\n"); > > > > I wonder this should say 'Tracing program...' instead, > > we have other tracing types not covered in this error > > > > jirka > > > > > return -EINVAL; > > > } > > > t = btf_type_by_id(btf, btf_id); > > > @@ -25597,7 +25597,7 @@ int bpf_check_attach_target(struct bpf_verifier_log *log, > > > if (aux->func && aux->func[subprog]->aux->exception_cb) { > > > bpf_log(log, > > > "%s programs cannot attach to exception callback\n", > > > - prog_extension ? "Extension" : "FENTRY/FEXIT"); > > > + prog_extension ? "Extension" : "FENTRY/FEXIT/FSESSION"); > > I guess that we'd better use "Tracing" instead of "FENTRY/FEXIT/FSESSION" > here too? ah right lgtm jirka